Help with making my diy cooltube

Duct tape my friend. Dont use glue

thanks, i was thinking that but thought it would melt or something

nah you'll be fine dont try and over complicate things, just get some duct and some duct tape and attach it and youll be good just make sure your pulling enough air over the light is the only thing you need to worry about but as long as you have a centrifugal fan your in the green lol literally

my cooltube seems not to be working :s its helping a bit but i can still easily feel the heat coming threw the pyrex tube , i've got some pics, there must be something im doing wrong, the other end is open that could be it, or my fan isn't powerful enough ??? my temps are at 34C, i know the optimal temp is 25C but for now could i keep the plants in there ?? or is that way to hot ?
IMG_0137[1].jpgIMG_0136[1].jpgIMG_0135[1].jpgIMG_0134[1].jpg

please help !!

is the fan the plastic thing on the end of your light or is that just to connect the cool tube to exhaust? if so i dont think your fan is gonna cut it


Edit: also HID lights produce a good amount of radiation that you cant really do to much about. If your not sure what i mean it's like how you can get sunburn in the winter, heat inst necessarily the problem (In another thread you asked about a heat shield, that would block the radiation and turn it to heat at least thats what i think im not 100 on this im just useing common sense) but that being said your cool tube should be cool enough to touch with out burning yourself other wise you need to upgrade your fan.

I used a sheet of metal ducting -

Dont even think about using duct tape unless you want a disaster,or even a possiblr fire,i dont know how people sleep at night after they rig shit up,especially something that should it fall apart would have terrible consequences.

There is a very simple & cheap solution that dont require taking dangerous risks like duct tape.

What you need is a pipe connector,they are for connecting 2 peices of plumging together where a flexible joint is required or when a standard connection cant be made,the brand name is Oatey,they are made out of black neoprene rubber & are extremely durable,they are about 1/4 inch thick & come in standard sizes from 1 inch all the way up to 10 inches.

You would use it by slipping on end of the boot over the cool tube & the other end over the fan flange,then tightening clamps on each end,these type pipe boot connectors are how pyrex plumbing products are routinely connected together with in construction applications,the connector will easily hold the load of the fan weight & be able to take the heat from the bulb,the hose type clamps on each end disperse the clamping force equally so its very hard to break the pyrex from over tightening.

Any home depot type store or plumbing supply will have them in stock,they only cost around $7 for a 6,7 or 8 inch boot.

Good luck & dont use duct tape.

Originally Posted by acidbox420

is the fan the plastic thing on the end of your light or is that just to connect the cool tube to exhaust? if so i dont think your fan is gonna cut it


Edit: also HID lights produce a good amount of radiation that you cant really do to much about. If your not sure what i mean it's like how you can get sunburn in the winter, heat inst necessarily the problem (In another thread you asked about a heat shield, that would block the radiation and turn it to heat at least thats what i think im not 100 on this im just useing common sense) but that being said your cool tube should be cool enough to touch with out burning yourself other wise you need to upgrade your fan.

the fan is the plastic thing on the end of the cool tubeIMG_0135[1].jpg this is pulling the air out and up through the ducting and out of the grow set up. and i can touch my coll tube but its bloody hot and its heating my grow box.